抵御执行器故障的满意容错控制

Satisfactory Fault-tolerant Control Against Actuator Failures

针对不确定性不满足匹配条件的线性离散系统,研究了执行器失效后满足H2性能指标和H∞扰动约束的二次D-稳定满意容错控制问题。在连续型增益故障模型下,建立了容错控制中期望指标的相容性方法,分析了与H∞指标相容的H2性能指标的取值范围。同时给出了二次D-稳定满意容错控制器存在的充分条件,并在相容指标约束下给出了控制器的构造性设计方法。

For a class of linear discrete-time systems with uncertainties which do not satisfy matching conditions, the problem of quadratic D-stability satisfactory fault-tolerant control with H2 performance index and H-infinity constrains against actuator failures was presented. Based on a more practical and general model of actuator continuous gain failures, the consistency method of performance indices was set up for fault-tolerant control and the ranges of H2 performance indices which are consistent with H- infinity indices were analyzed in detail. Meanwhile, sufficient conditions for existence of quadratic Dstability satisfactory fault-tolerant controller were developed. Furthermore, the effective constructive controller design method with constrains of consistent indices was provided.